HFBR-0528 Avago Technologies US Inc., HFBR-0528 Datasheet - Page 14

• Manufacturer Part Number: HFBR-0528
• Description: KIT EVAL FIBER OPTIC 10MBD
• Manufacturer: Avago Technologies US Inc.

Specifications of HFBR-0528

• Main Purpose: Interface, Fiber Optics
• Embedded: No
• Utilized Ic / Part: HFBR-1528, HFBR-2528
• Primary Attributes: 10MBd, Communication up to 50m using 1mm POF
• Secondary Attributes: Crimpless Connectors
• Silicon Core Number: HFBR-1528, HFBR-2528
• Kit Contents: TX/RX Mods, Cable, Pol Kit, SW, Pwr. Sup
• Silicon Family Name: Versatile Link
• Features: Fiber Optic Transmitter And Receiver
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 516-2144; HFBR-0528

5510-21
Figure 21. CAN with Passive Star Coupler.
Table V/2: Typical Insertion Loss at 660 nm for 1 mm POF Star
coupler.
IL(dB) = 20
For detailed specifications, please contact suppliers
,24, 25]
Equation V/2:
P
(dBm)
P
(dBm)
IL: Insertion loss measured from input port to output
port (dB) of the passive star coupler
OPM: Optical power margin in (dB)
α(max): Maximum attenuation of fiber in (dB/m)
4
l(max) =
P (T) = P (25) –
P (dBm) = 10
l(min) =
l =
T
RL , (min)
V (T) = V (25)
R1 =
T
(min): Minimum coupled power of transmitter in
F
Ports
.
2•2
3•3
4•4
5•5
7•7
P (min)
T
vp =
: Sensitivity of the receiver [coupled power]
Vcc - Vce - V
T
•
Pt(max) - P
−
P (min) - P
I
F
log
F
•
T
c
n
P
log
in m/s
RL, min
a(min)
Insertion Loss
a(max)
−
d1
d2
F
P(mW)
1mW
+ 20
0 dB
 dB
4 dB
7 dB
7 dB
∆
∆
−
a(max)
RL, max
∆
∆
RL, min
P
V
IL(max)
T
T
T
F
•
•
log
• (T – 25)
(T – 25)
(in m)
- IL - OPM
−
MASTER
COMPUTER
PASSIVE STAR
COUPLER
OPM
NA2
NA1
(m)
CONTROLLER
CONTROLLER
PROCESS
PROCESS
TX RX
TX RX
[23
The maximum data rate is also a function of the maxi-
mum distance between two nodes, because the propa-
gation delay time must be less than half the bit time. The
propagation delay constant for optical signals is 4.8 ns/
m in fiber-optic links because the signal speed is equal
to the speed of light divided by the refractive index. The
propagation delay of the transmitter and receiver are
listed in Table V/3. Transmitter and receiver delays must
be added to the propagation delay of the fiber to deter-
mine the total delay of the fiber-optic link.
2. Gate Driving Using Fiber-Optic Interfaces
With the improvements in the development of power
switches such as GTOs and IGBTs, frequency inverters
can be operated at higher speed and higher power lev-
els. On one hand, the circuit needed to drive the gates
of IGBTs and GTOs has to be fast. On the other hand,
the gate-drives must reliably reject the higher and faster
switching transient voltages caused by the large varia-
tions in current in the power rails.
CONTROLLER
CONTROLLER
PROCESS
PROCESS
TX RX
TX RX